The **RAC48-24S/SASH/OF** is a specialized, open-frame AC/DC converter manufactured by **RECOM Power**. This specific model is designed for high-reliability industrial and medical applications where space is limited and high efficiency is required. Below is a breakdown of its electronic specifications and features. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 85V AC to 264V AC (Universal Input) | | **Output Voltage** | 24V DC | | **Output Power** | 48 Watts | | **Output Current** | 2.0 Amps | | **Efficiency** | ~88% Typical | | **Isolation Voltage** | 4kV AC (Input to Output) | | **Form Factor** | Open Frame (/OF suffix) | --- ### 2. Breakdown of the Model Name Understanding the nomenclature helps identify the part's capabilities: * **RAC48:** Series name, indicating a 48W rated AC/DC converter. * **24S:** Indicates a Single (S) output of 24 Volts. * **SASH:** This suffix usually refers to the specific safety certification tier or a specific physical mounting/terminal style (often related to enhanced surge protection or medical grade). * **OF:** Stands for **Open Frame**. This means the PCB is exposed (no plastic or metal casing), allowing for better heat dissipation via airflow and a smaller footprint. --- ### 3. Electronic Protection Features The internal circuitry includes several protection layers to prevent damage to the load or the power supply itself: 1. **Over-Voltage Protection (OVP):** Clamps the output if the voltage exceeds a safe threshold. 2. **Short Circuit Protection (SCP):** The unit will enter "hiccup mode" or shut down if a short is detected, recovering automatically once the fault is removed. 3. **Over-Load Protection (OLP):** Prevents the internal components from overheating if the current draw exceeds 2.0A. 4. **EMI Filtering:** Includes internal Class B EMC filtering components to minimize electromagnetic interference with nearby electronics. --- ### 4. Physical and Environmental Characteristics * **Cooling:** Primarily relies on free-air convection. Because it is an **Open Frame** design, it is crucial to maintain adequate clearance around the board. * **Operating Temperature:** Generally rated from -25°C to +70°C (with derating at higher temperatures). * **Connectors:** Typically utilizes pin-headers or screw terminals depending on the specific sub-variation of the SASH line. ---